1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * super.c 5 * 6 * load/unload driver, mount/dismount volumes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/fs.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/highmem.h> 31 #include <linux/init.h> 32 #include <linux/random.h> 33 #include <linux/statfs.h> 34 #include <linux/moduleparam.h> 35 #include <linux/blkdev.h> 36 #include <linux/socket.h> 37 #include <linux/inet.h> 38 #include <linux/parser.h> 39 #include <linux/crc32.h> 40 #include <linux/debugfs.h> 41 #include <linux/mount.h> 42 #include <linux/seq_file.h> 43 #include <linux/quotaops.h> 44 #include <linux/cleancache.h> 45 46 #define CREATE_TRACE_POINTS 47 #include "ocfs2_trace.h" 48 49 #include <cluster/masklog.h> 50 51 #include "ocfs2.h" 52 53 /* this should be the only file to include a version 1 header */ 54 #include "ocfs1_fs_compat.h" 55 56 #include "alloc.h" 57 #include "aops.h" 58 #include "blockcheck.h" 59 #include "dlmglue.h" 60 #include "export.h" 61 #include "extent_map.h" 62 #include "heartbeat.h" 63 #include "inode.h" 64 #include "journal.h" 65 #include "localalloc.h" 66 #include "namei.h" 67 #include "slot_map.h" 68 #include "super.h" 69 #include "sysfile.h" 70 #include "uptodate.h" 71 #include "xattr.h" 72 #include "quota.h" 73 #include "refcounttree.h" 74 #include "suballoc.h" 75 76 #include "buffer_head_io.h" 77 78 static struct kmem_cache *ocfs2_inode_cachep; 79 struct kmem_cache *ocfs2_dquot_cachep; 80 struct kmem_cache *ocfs2_qf_chunk_cachep; 81 82 /* OCFS2 needs to schedule several different types of work which 83 * require cluster locking, disk I/O, recovery waits, etc. Since these 84 * types of work tend to be heavy we avoid using the kernel events 85 * workqueue and schedule on our own. */ 86 struct workqueue_struct *ocfs2_wq = NULL; 87 88 static struct dentry *ocfs2_debugfs_root; 89 90 MODULE_AUTHOR("Oracle"); 91 MODULE_LICENSE("GPL"); 92 MODULE_DESCRIPTION("OCFS2 cluster file system"); 93 94 struct mount_options 95 { 96 unsigned long commit_interval; 97 unsigned long mount_opt; 98 unsigned int atime_quantum; 99 signed short slot; 100 int localalloc_opt; 101 unsigned int resv_level; 102 int dir_resv_level; 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 104 }; 105 106 static int ocfs2_parse_options(struct super_block *sb, char *options, 107 struct mount_options *mopt, 108 int is_remount); 109 static int ocfs2_check_set_options(struct super_block *sb, 110 struct mount_options *options); 111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root); 112 static void ocfs2_put_super(struct super_block *sb); 113 static int ocfs2_mount_volume(struct super_block *sb); 114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data); 115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); 116 static int ocfs2_initialize_mem_caches(void); 117 static void ocfs2_free_mem_caches(void); 118 static void ocfs2_delete_osb(struct ocfs2_super *osb); 119 120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); 121 122 static int ocfs2_sync_fs(struct super_block *sb, int wait); 123 124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); 125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); 126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb); 127 static int ocfs2_check_volume(struct ocfs2_super *osb); 128 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 129 struct buffer_head *bh, 130 u32 sectsize, 131 struct ocfs2_blockcheck_stats *stats); 132 static int ocfs2_initialize_super(struct super_block *sb, 133 struct buffer_head *bh, 134 int sector_size, 135 struct ocfs2_blockcheck_stats *stats); 136 static int ocfs2_get_sector(struct super_block *sb, 137 struct buffer_head **bh, 138 int block, 139 int sect_size); 140 static struct inode *ocfs2_alloc_inode(struct super_block *sb); 141 static void ocfs2_destroy_inode(struct inode *inode); 142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); 143 static int ocfs2_enable_quotas(struct ocfs2_super *osb); 144 static void ocfs2_disable_quotas(struct ocfs2_super *osb); 145 146 static struct dquot **ocfs2_get_dquots(struct inode *inode) 147 { 148 return OCFS2_I(inode)->i_dquot; 149 } 150 151 static const struct super_operations ocfs2_sops = { 152 .statfs = ocfs2_statfs, 153 .alloc_inode = ocfs2_alloc_inode, 154 .destroy_inode = ocfs2_destroy_inode, 155 .drop_inode = ocfs2_drop_inode, 156 .evict_inode = ocfs2_evict_inode, 157 .sync_fs = ocfs2_sync_fs, 158 .put_super = ocfs2_put_super, 159 .remount_fs = ocfs2_remount, 160 .show_options = ocfs2_show_options, 161 .quota_read = ocfs2_quota_read, 162 .quota_write = ocfs2_quota_write, 163 .get_dquots = ocfs2_get_dquots, 164 }; 165 166 enum { 167 Opt_barrier, 168 Opt_err_panic, 169 Opt_err_ro, 170 Opt_intr, 171 Opt_nointr, 172 Opt_hb_none, 173 Opt_hb_local, 174 Opt_hb_global, 175 Opt_data_ordered, 176 Opt_data_writeback, 177 Opt_atime_quantum, 178 Opt_slot, 179 Opt_commit, 180 Opt_localalloc, 181 Opt_localflocks, 182 Opt_stack, 183 Opt_user_xattr, 184 Opt_nouser_xattr, 185 Opt_inode64, 186 Opt_acl, 187 Opt_noacl, 188 Opt_usrquota, 189 Opt_grpquota, 190 Opt_coherency_buffered, 191 Opt_coherency_full, 192 Opt_resv_level, 193 Opt_dir_resv_level, 194 Opt_journal_async_commit, 195 Opt_err, 196 }; 197 198 static const match_table_t tokens = { 199 {Opt_barrier, "barrier=%u"}, 200 {Opt_err_panic, "errors=panic"}, 201 {Opt_err_ro, "errors=remount-ro"}, 202 {Opt_intr, "intr"}, 203 {Opt_nointr, "nointr"}, 204 {Opt_hb_none, OCFS2_HB_NONE}, 205 {Opt_hb_local, OCFS2_HB_LOCAL}, 206 {Opt_hb_global, OCFS2_HB_GLOBAL}, 207 {Opt_data_ordered, "data=ordered"}, 208 {Opt_data_writeback, "data=writeback"}, 209 {Opt_atime_quantum, "atime_quantum=%u"}, 210 {Opt_slot, "preferred_slot=%u"}, 211 {Opt_commit, "commit=%u"}, 212 {Opt_localalloc, "localalloc=%d"}, 213 {Opt_localflocks, "localflocks"}, 214 {Opt_stack, "cluster_stack=%s"}, 215 {Opt_user_xattr, "user_xattr"}, 216 {Opt_nouser_xattr, "nouser_xattr"}, 217 {Opt_inode64, "inode64"}, 218 {Opt_acl, "acl"}, 219 {Opt_noacl, "noacl"}, 220 {Opt_usrquota, "usrquota"}, 221 {Opt_grpquota, "grpquota"}, 222 {Opt_coherency_buffered, "coherency=buffered"}, 223 {Opt_coherency_full, "coherency=full"}, 224 {Opt_resv_level, "resv_level=%u"}, 225 {Opt_dir_resv_level, "dir_resv_level=%u"}, 226 {Opt_journal_async_commit, "journal_async_commit"}, 227 {Opt_err, NULL} 228 }; 229 230 #ifdef CONFIG_DEBUG_FS 231 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) 232 { 233 struct ocfs2_cluster_connection *cconn = osb->cconn; 234 struct ocfs2_recovery_map *rm = osb->recovery_map; 235 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan; 236 int i, out = 0; 237 238 out += snprintf(buf + out, len - out, 239 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n", 240 "Device", osb->dev_str, osb->uuid_str, 241 osb->fs_generation, osb->vol_label); 242 243 out += snprintf(buf + out, len - out, 244 "%10s => State: %d Flags: 0x%lX\n", "Volume", 245 atomic_read(&osb->vol_state), osb->osb_flags); 246 247 out += snprintf(buf + out, len - out, 248 "%10s => Block: %lu Cluster: %d\n", "Sizes", 249 osb->sb->s_blocksize, osb->s_clustersize); 250 251 out += snprintf(buf + out, len - out, 252 "%10s => Compat: 0x%X Incompat: 0x%X " 253 "ROcompat: 0x%X\n", 254 "Features", osb->s_feature_compat, 255 osb->s_feature_incompat, osb->s_feature_ro_compat); 256 257 out += snprintf(buf + out, len - out, 258 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount", 259 osb->s_mount_opt, osb->s_atime_quantum); 260 261 if (cconn) { 262 out += snprintf(buf + out, len - out, 263 "%10s => Stack: %s Name: %*s " 264 "Version: %d.%d\n", "Cluster", 265 (*osb->osb_cluster_stack == '\0' ? 266 "o2cb" : osb->osb_cluster_stack), 267 cconn->cc_namelen, cconn->cc_name, 268 cconn->cc_version.pv_major, 269 cconn->cc_version.pv_minor); 270 } 271 272 spin_lock(&osb->dc_task_lock); 273 out += snprintf(buf + out, len - out, 274 "%10s => Pid: %d Count: %lu WakeSeq: %lu " 275 "WorkSeq: %lu\n", "DownCnvt", 276 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1), 277 osb->blocked_lock_count, osb->dc_wake_sequence, 278 osb->dc_work_sequence); 279 spin_unlock(&osb->dc_task_lock); 280 281 spin_lock(&osb->osb_lock); 282 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:", 283 "Recovery", 284 (osb->recovery_thread_task ? 285 task_pid_nr(osb->recovery_thread_task) : -1)); 286 if (rm->rm_used == 0) 287 out += snprintf(buf + out, len - out, " None\n"); 288 else { 289 for (i = 0; i < rm->rm_used; i++) 290 out += snprintf(buf + out, len - out, " %d", 291 rm->rm_entries[i]); 292 out += snprintf(buf + out, len - out, "\n"); 293 } 294 spin_unlock(&osb->osb_lock); 295 296 out += snprintf(buf + out, len - out, 297 "%10s => Pid: %d Interval: %lu\n", "Commit", 298 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), 299 osb->osb_commit_interval); 300 301 out += snprintf(buf + out, len - out, 302 "%10s => State: %d TxnId: %lu NumTxns: %d\n", 303 "Journal", osb->journal->j_state, 304 osb->journal->j_trans_id, 305 atomic_read(&osb->journal->j_num_trans)); 306 307 out += snprintf(buf + out, len - out, 308 "%10s => GlobalAllocs: %d LocalAllocs: %d " 309 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n", 310 "Stats", 311 atomic_read(&osb->alloc_stats.bitmap_data), 312 atomic_read(&osb->alloc_stats.local_data), 313 atomic_read(&osb->alloc_stats.bg_allocs), 314 atomic_read(&osb->alloc_stats.moves), 315 atomic_read(&osb->alloc_stats.bg_extends)); 316 317 out += snprintf(buf + out, len - out, 318 "%10s => State: %u Descriptor: %llu Size: %u bits " 319 "Default: %u bits\n", 320 "LocalAlloc", osb->local_alloc_state, 321 (unsigned long long)osb->la_last_gd, 322 osb->local_alloc_bits, osb->local_alloc_default_bits); 323 324 spin_lock(&osb->osb_lock); 325 out += snprintf(buf + out, len - out, 326 "%10s => InodeSlot: %d StolenInodes: %d, " 327 "MetaSlot: %d StolenMeta: %d\n", "Steal", 328 osb->s_inode_steal_slot, 329 atomic_read(&osb->s_num_inodes_stolen), 330 osb->s_meta_steal_slot, 331 atomic_read(&osb->s_num_meta_stolen)); 332 spin_unlock(&osb->osb_lock); 333 334 out += snprintf(buf + out, len - out, "OrphanScan => "); 335 out += snprintf(buf + out, len - out, "Local: %u Global: %u ", 336 os->os_count, os->os_seqno); 337 out += snprintf(buf + out, len - out, " Last Scan: "); 338 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) 339 out += snprintf(buf + out, len - out, "Disabled\n"); 340 else 341 out += snprintf(buf + out, len - out, "%lu seconds ago\n", 342 (get_seconds() - os->os_scantime.tv_sec)); 343 344 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n", 345 "Slots", "Num", "RecoGen"); 346 for (i = 0; i < osb->max_slots; ++i) { 347 out += snprintf(buf + out, len - out, 348 "%10s %c %3d %10d\n", 349 " ", 350 (i == osb->slot_num ? '*' : ' '), 351 i, osb->slot_recovery_generations[i]); 352 } 353 354 return out; 355 } 356 357 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 358 { 359 struct ocfs2_super *osb = inode->i_private; 360 char *buf = NULL; 361 362 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 363 if (!buf) 364 goto bail; 365 366 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE)); 367 368 file->private_data = buf; 369 370 return 0; 371 bail: 372 return -ENOMEM; 373 } 374 375 static int ocfs2_debug_release(struct inode *inode, struct file *file) 376 { 377 kfree(file->private_data); 378 return 0; 379 } 380 381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 382 size_t nbytes, loff_t *ppos) 383 { 384 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, 385 i_size_read(file->f_mapping->host)); 386 } 387 #else 388 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) 389 { 390 return 0; 391 } 392 static int ocfs2_debug_release(struct inode *inode, struct file *file) 393 { 394 return 0; 395 } 396 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, 397 size_t nbytes, loff_t *ppos) 398 { 399 return 0; 400 } 401 #endif /* CONFIG_DEBUG_FS */ 402 403 static const struct file_operations ocfs2_osb_debug_fops = { 404 .open = ocfs2_osb_debug_open, 405 .release = ocfs2_debug_release, 406 .read = ocfs2_debug_read, 407 .llseek = generic_file_llseek, 408 }; 409 410 static int ocfs2_sync_fs(struct super_block *sb, int wait) 411 { 412 int status; 413 tid_t target; 414 struct ocfs2_super *osb = OCFS2_SB(sb); 415 416 if (ocfs2_is_hard_readonly(osb)) 417 return -EROFS; 418 419 if (wait) { 420 status = ocfs2_flush_truncate_log(osb); 421 if (status < 0) 422 mlog_errno(status); 423 } else { 424 ocfs2_schedule_truncate_log_flush(osb, 0); 425 } 426 427 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal, 428 &target)) { 429 if (wait) 430 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal, 431 target); 432 } 433 return 0; 434 } 435 436 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) 437 { 438 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA) 439 && (ino == USER_QUOTA_SYSTEM_INODE 440 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE)) 441 return 0; 442 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 443 && (ino == GROUP_QUOTA_SYSTEM_INODE 444 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE)) 445 return 0; 446 return 1; 447 } 448 449 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) 450 { 451 struct inode *new = NULL; 452 int status = 0; 453 int i; 454 455 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 456 if (IS_ERR(new)) { 457 status = PTR_ERR(new); 458 mlog_errno(status); 459 goto bail; 460 } 461 osb->root_inode = new; 462 463 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0); 464 if (IS_ERR(new)) { 465 status = PTR_ERR(new); 466 mlog_errno(status); 467 goto bail; 468 } 469 osb->sys_root_inode = new; 470 471 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; 472 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { 473 if (!ocfs2_need_system_inode(osb, i)) 474 continue; 475 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 476 if (!new) { 477 ocfs2_release_system_inodes(osb); 478 status = -EINVAL; 479 mlog_errno(status); 480 /* FIXME: Should ERROR_RO_FS */ 481 mlog(ML_ERROR, "Unable to load system inode %d, " 482 "possibly corrupt fs?", i); 483 goto bail; 484 } 485 // the array now has one ref, so drop this one 486 iput(new); 487 } 488 489 bail: 490 if (status) 491 mlog_errno(status); 492 return status; 493 } 494 495 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) 496 { 497 struct inode *new = NULL; 498 int status = 0; 499 int i; 500 501 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; 502 i < NUM_SYSTEM_INODES; 503 i++) { 504 if (!ocfs2_need_system_inode(osb, i)) 505 continue; 506 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); 507 if (!new) { 508 ocfs2_release_system_inodes(osb); 509 status = -EINVAL; 510 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", 511 status, i, osb->slot_num); 512 goto bail; 513 } 514 /* the array now has one ref, so drop this one */ 515 iput(new); 516 } 517 518 bail: 519 if (status) 520 mlog_errno(status); 521 return status; 522 } 523 524 static void ocfs2_release_system_inodes(struct ocfs2_super *osb) 525 { 526 int i; 527 struct inode *inode; 528 529 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) { 530 inode = osb->global_system_inodes[i]; 531 if (inode) { 532 iput(inode); 533 osb->global_system_inodes[i] = NULL; 534 } 535 } 536 537 inode = osb->sys_root_inode; 538 if (inode) { 539 iput(inode); 540 osb->sys_root_inode = NULL; 541 } 542 543 inode = osb->root_inode; 544 if (inode) { 545 iput(inode); 546 osb->root_inode = NULL; 547 } 548 549 if (!osb->local_system_inodes) 550 return; 551 552 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) { 553 if (osb->local_system_inodes[i]) { 554 iput(osb->local_system_inodes[i]); 555 osb->local_system_inodes[i] = NULL; 556 } 557 } 558 559 kfree(osb->local_system_inodes); 560 osb->local_system_inodes = NULL; 561 } 562 563 /* We're allocating fs objects, use GFP_NOFS */ 564 static struct inode *ocfs2_alloc_inode(struct super_block *sb) 565 { 566 struct ocfs2_inode_info *oi; 567 568 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS); 569 if (!oi) 570 return NULL; 571 572 oi->i_sync_tid = 0; 573 oi->i_datasync_tid = 0; 574 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot)); 575 576 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode); 577 return &oi->vfs_inode; 578 } 579 580 static void ocfs2_i_callback(struct rcu_head *head) 581 { 582 struct inode *inode = container_of(head, struct inode, i_rcu); 583 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); 584 } 585 586 static void ocfs2_destroy_inode(struct inode *inode) 587 { 588 call_rcu(&inode->i_rcu, ocfs2_i_callback); 589 } 590 591 static unsigned long long ocfs2_max_file_offset(unsigned int bbits, 592 unsigned int cbits) 593 { 594 unsigned int bytes = 1 << cbits; 595 unsigned int trim = bytes; 596 unsigned int bitshift = 32; 597 598 /* 599 * i_size and all block offsets in ocfs2 are always 64 bits 600 * wide. i_clusters is 32 bits, in cluster-sized units. So on 601 * 64 bit platforms, cluster size will be the limiting factor. 602 */ 603 604 #if BITS_PER_LONG == 32 605 # if defined(CONFIG_LBDAF) 606 BUILD_BUG_ON(sizeof(sector_t) != 8); 607 /* 608 * We might be limited by page cache size. 609 */ 610 if (bytes > PAGE_CACHE_SIZE) { 611 bytes = PAGE_CACHE_SIZE; 612 trim = 1; 613 /* 614 * Shift by 31 here so that we don't get larger than 615 * MAX_LFS_FILESIZE 616 */ 617 bitshift = 31; 618 } 619 # else 620 /* 621 * We are limited by the size of sector_t. Use block size, as 622 * that's what we expose to the VFS. 623 */ 624 bytes = 1 << bbits; 625 trim = 1; 626 bitshift = 31; 627 # endif 628 #endif 629 630 /* 631 * Trim by a whole cluster when we can actually approach the 632 * on-disk limits. Otherwise we can overflow i_clusters when 633 * an extent start is at the max offset. 634 */ 635 return (((unsigned long long)bytes) << bitshift) - trim; 636 } 637 638 static int ocfs2_remount(struct super_block *sb, int *flags, char *data) 639 { 640 int incompat_features; 641 int ret = 0; 642 struct mount_options parsed_options; 643 struct ocfs2_super *osb = OCFS2_SB(sb); 644 u32 tmp; 645 646 sync_filesystem(sb); 647 648 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) || 649 !ocfs2_check_set_options(sb, &parsed_options)) { 650 ret = -EINVAL; 651 goto out; 652 } 653 654 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL | 655 OCFS2_MOUNT_HB_NONE; 656 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) { 657 ret = -EINVAL; 658 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); 659 goto out; 660 } 661 662 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != 663 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) { 664 ret = -EINVAL; 665 mlog(ML_ERROR, "Cannot change data mode on remount\n"); 666 goto out; 667 } 668 669 /* Probably don't want this on remount; it might 670 * mess with other nodes */ 671 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) && 672 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) { 673 ret = -EINVAL; 674 mlog(ML_ERROR, "Cannot enable inode64 on remount\n"); 675 goto out; 676 } 677 678 /* We're going to/from readonly mode. */ 679 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 680 /* Disable quota accounting before remounting RO */ 681 if (*flags & MS_RDONLY) { 682 ret = ocfs2_susp_quotas(osb, 0); 683 if (ret < 0) 684 goto out; 685 } 686 /* Lock here so the check of HARD_RO and the potential 687 * setting of SOFT_RO is atomic. */ 688 spin_lock(&osb->osb_lock); 689 if (osb->osb_flags & OCFS2_OSB_HARD_RO) { 690 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); 691 ret = -EROFS; 692 goto unlock_osb; 693 } 694 695 if (*flags & MS_RDONLY) { 696 sb->s_flags |= MS_RDONLY; 697 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 698 } else { 699 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { 700 mlog(ML_ERROR, "Cannot remount RDWR " 701 "filesystem due to previous errors.\n"); 702 ret = -EROFS; 703 goto unlock_osb; 704 } 705 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); 706 if (incompat_features) { 707 mlog(ML_ERROR, "Cannot remount RDWR because " 708 "of unsupported optional features " 709 "(%x).\n", incompat_features); 710 ret = -EINVAL; 711 goto unlock_osb; 712 } 713 sb->s_flags &= ~MS_RDONLY; 714 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; 715 } 716 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags); 717 unlock_osb: 718 spin_unlock(&osb->osb_lock); 719 /* Enable quota accounting after remounting RW */ 720 if (!ret && !(*flags & MS_RDONLY)) { 721 if (sb_any_quota_suspended(sb)) 722 ret = ocfs2_susp_quotas(osb, 1); 723 else 724 ret = ocfs2_enable_quotas(osb); 725 if (ret < 0) { 726 /* Return back changes... */ 727 spin_lock(&osb->osb_lock); 728 sb->s_flags |= MS_RDONLY; 729 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 730 spin_unlock(&osb->osb_lock); 731 goto out; 732 } 733 } 734 } 735 736 if (!ret) { 737 /* Only save off the new mount options in case of a successful 738 * remount. */ 739 osb->s_mount_opt = parsed_options.mount_opt; 740 osb->s_atime_quantum = parsed_options.atime_quantum; 741 osb->preferred_slot = parsed_options.slot; 742 if (parsed_options.commit_interval) 743 osb->osb_commit_interval = parsed_options.commit_interval; 744 745 if (!ocfs2_is_hard_readonly(osb)) 746 ocfs2_set_journal_params(osb); 747 748 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 749 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? 750 MS_POSIXACL : 0); 751 } 752 out: 753 return ret; 754 } 755 756 static int ocfs2_sb_probe(struct super_block *sb, 757 struct buffer_head **bh, 758 int *sector_size, 759 struct ocfs2_blockcheck_stats *stats) 760 { 761 int status, tmpstat; 762 struct ocfs1_vol_disk_hdr *hdr; 763 struct ocfs2_dinode *di; 764 int blksize; 765 766 *bh = NULL; 767 768 /* may be > 512 */ 769 *sector_size = bdev_logical_block_size(sb->s_bdev); 770 if (*sector_size > OCFS2_MAX_BLOCKSIZE) { 771 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", 772 *sector_size, OCFS2_MAX_BLOCKSIZE); 773 status = -EINVAL; 774 goto bail; 775 } 776 777 /* Can this really happen? */ 778 if (*sector_size < OCFS2_MIN_BLOCKSIZE) 779 *sector_size = OCFS2_MIN_BLOCKSIZE; 780 781 /* check block zero for old format */ 782 status = ocfs2_get_sector(sb, bh, 0, *sector_size); 783 if (status < 0) { 784 mlog_errno(status); 785 goto bail; 786 } 787 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; 788 if (hdr->major_version == OCFS1_MAJOR_VERSION) { 789 mlog(ML_ERROR, "incompatible version: %u.%u\n", 790 hdr->major_version, hdr->minor_version); 791 status = -EINVAL; 792 } 793 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, 794 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { 795 mlog(ML_ERROR, "incompatible volume signature: %8s\n", 796 hdr->signature); 797 status = -EINVAL; 798 } 799 brelse(*bh); 800 *bh = NULL; 801 if (status < 0) { 802 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " 803 "upgraded before mounting with ocfs v2\n"); 804 goto bail; 805 } 806 807 /* 808 * Now check at magic offset for 512, 1024, 2048, 4096 809 * blocksizes. 4096 is the maximum blocksize because it is 810 * the minimum clustersize. 811 */ 812 status = -EINVAL; 813 for (blksize = *sector_size; 814 blksize <= OCFS2_MAX_BLOCKSIZE; 815 blksize <<= 1) { 816 tmpstat = ocfs2_get_sector(sb, bh, 817 OCFS2_SUPER_BLOCK_BLKNO, 818 blksize); 819 if (tmpstat < 0) { 820 status = tmpstat; 821 mlog_errno(status); 822 break; 823 } 824 di = (struct ocfs2_dinode *) (*bh)->b_data; 825 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats)); 826 spin_lock_init(&stats->b_lock); 827 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats); 828 if (tmpstat < 0) { 829 brelse(*bh); 830 *bh = NULL; 831 } 832 if (tmpstat != -EAGAIN) { 833 status = tmpstat; 834 break; 835 } 836 } 837 838 bail: 839 return status; 840 } 841 842 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) 843 { 844 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL; 845 846 if (osb->s_mount_opt & hb_enabled) { 847 if (ocfs2_mount_local(osb)) { 848 mlog(ML_ERROR, "Cannot heartbeat on a locally " 849 "mounted device.\n"); 850 return -EINVAL; 851 } 852 if (ocfs2_userspace_stack(osb)) { 853 mlog(ML_ERROR, "Userspace stack expected, but " 854 "o2cb heartbeat arguments passed to mount\n"); 855 return -EINVAL; 856 } 857 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) && 858 !ocfs2_cluster_o2cb_global_heartbeat(osb)) || 859 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) && 860 ocfs2_cluster_o2cb_global_heartbeat(osb))) { 861 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n"); 862 return -EINVAL; 863 } 864 } 865 866 if (!(osb->s_mount_opt & hb_enabled)) { 867 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) && 868 !ocfs2_userspace_stack(osb)) { 869 mlog(ML_ERROR, "Heartbeat has to be started to mount " 870 "a read-write clustered device.\n"); 871 return -EINVAL; 872 } 873 } 874 875 return 0; 876 } 877 878 /* 879 * If we're using a userspace stack, mount should have passed 880 * a name that matches the disk. If not, mount should not 881 * have passed a stack. 882 */ 883 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, 884 struct mount_options *mopt) 885 { 886 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) { 887 mlog(ML_ERROR, 888 "cluster stack passed to mount, but this filesystem " 889 "does not support it\n"); 890 return -EINVAL; 891 } 892 893 if (ocfs2_userspace_stack(osb) && 894 strncmp(osb->osb_cluster_stack, mopt->cluster_stack, 895 OCFS2_STACK_LABEL_LEN)) { 896 mlog(ML_ERROR, 897 "cluster stack passed to mount (\"%s\") does not " 898 "match the filesystem (\"%s\")\n", 899 mopt->cluster_stack, 900 osb->osb_cluster_stack); 901 return -EINVAL; 902 } 903 904 return 0; 905 } 906 907 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) 908 { 909 int type; 910 struct super_block *sb = osb->sb; 911 unsigned int feature[OCFS2_MAXQUOTAS] = { 912 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 913 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 914 int status = 0; 915 916 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 917 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 918 continue; 919 if (unsuspend) 920 status = dquot_resume(sb, type); 921 else { 922 struct ocfs2_mem_dqinfo *oinfo; 923 924 /* Cancel periodic syncing before suspending */ 925 oinfo = sb_dqinfo(sb, type)->dqi_priv; 926 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 927 status = dquot_suspend(sb, type); 928 } 929 if (status < 0) 930 break; 931 } 932 if (status < 0) 933 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on " 934 "remount (error = %d).\n", status); 935 return status; 936 } 937 938 static int ocfs2_enable_quotas(struct ocfs2_super *osb) 939 { 940 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL }; 941 struct super_block *sb = osb->sb; 942 unsigned int feature[OCFS2_MAXQUOTAS] = { 943 OCFS2_FEATURE_RO_COMPAT_USRQUOTA, 944 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; 945 unsigned int ino[OCFS2_MAXQUOTAS] = { 946 LOCAL_USER_QUOTA_SYSTEM_INODE, 947 LOCAL_GROUP_QUOTA_SYSTEM_INODE }; 948 int status; 949 int type; 950 951 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE; 952 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 953 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) 954 continue; 955 inode[type] = ocfs2_get_system_file_inode(osb, ino[type], 956 osb->slot_num); 957 if (!inode[type]) { 958 status = -ENOENT; 959 goto out_quota_off; 960 } 961 status = dquot_enable(inode[type], type, QFMT_OCFS2, 962 DQUOT_USAGE_ENABLED); 963 if (status < 0) 964 goto out_quota_off; 965 } 966 967 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 968 iput(inode[type]); 969 return 0; 970 out_quota_off: 971 ocfs2_disable_quotas(osb); 972 for (type = 0; type < OCFS2_MAXQUOTAS; type++) 973 iput(inode[type]); 974 mlog_errno(status); 975 return status; 976 } 977 978 static void ocfs2_disable_quotas(struct ocfs2_super *osb) 979 { 980 int type; 981 struct inode *inode; 982 struct super_block *sb = osb->sb; 983 struct ocfs2_mem_dqinfo *oinfo; 984 985 /* We mostly ignore errors in this function because there's not much 986 * we can do when we see them */ 987 for (type = 0; type < OCFS2_MAXQUOTAS; type++) { 988 if (!sb_has_quota_loaded(sb, type)) 989 continue; 990 /* Cancel periodic syncing before we grab dqonoff_mutex */ 991 oinfo = sb_dqinfo(sb, type)->dqi_priv; 992 cancel_delayed_work_sync(&oinfo->dqi_sync_work); 993 inode = igrab(sb->s_dquot.files[type]); 994 /* Turn off quotas. This will remove all dquot structures from 995 * memory and so they will be automatically synced to global 996 * quota files */ 997 dquot_disable(sb, type, DQUOT_USAGE_ENABLED | 998 DQUOT_LIMITS_ENABLED); 999 if (!inode) 1000 continue; 1001 iput(inode); 1002 } 1003 } 1004 1005 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) 1006 { 1007 struct dentry *root; 1008 int status, sector_size; 1009 struct mount_options parsed_options; 1010 struct inode *inode = NULL; 1011 struct ocfs2_super *osb = NULL; 1012 struct buffer_head *bh = NULL; 1013 char nodestr[12]; 1014 struct ocfs2_blockcheck_stats stats; 1015 1016 trace_ocfs2_fill_super(sb, data, silent); 1017 1018 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { 1019 status = -EINVAL; 1020 goto read_super_error; 1021 } 1022 1023 /* probe for superblock */ 1024 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats); 1025 if (status < 0) { 1026 mlog(ML_ERROR, "superblock probe failed!\n"); 1027 goto read_super_error; 1028 } 1029 1030 status = ocfs2_initialize_super(sb, bh, sector_size, &stats); 1031 osb = OCFS2_SB(sb); 1032 if (status < 0) { 1033 mlog_errno(status); 1034 goto read_super_error; 1035 } 1036 brelse(bh); 1037 bh = NULL; 1038 1039 if (!ocfs2_check_set_options(sb, &parsed_options)) { 1040 status = -EINVAL; 1041 goto read_super_error; 1042 } 1043 osb->s_mount_opt = parsed_options.mount_opt; 1044 osb->s_atime_quantum = parsed_options.atime_quantum; 1045 osb->preferred_slot = parsed_options.slot; 1046 osb->osb_commit_interval = parsed_options.commit_interval; 1047 1048 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt); 1049 osb->osb_resv_level = parsed_options.resv_level; 1050 osb->osb_dir_resv_level = parsed_options.resv_level; 1051 if (parsed_options.dir_resv_level == -1) 1052 osb->osb_dir_resv_level = parsed_options.resv_level; 1053 else 1054 osb->osb_dir_resv_level = parsed_options.dir_resv_level; 1055 1056 status = ocfs2_verify_userspace_stack(osb, &parsed_options); 1057 if (status) 1058 goto read_super_error; 1059 1060 sb->s_magic = OCFS2_SUPER_MAGIC; 1061 1062 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) | 1063 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1064 1065 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, 1066 * heartbeat=none */ 1067 if (bdev_read_only(sb->s_bdev)) { 1068 if (!(sb->s_flags & MS_RDONLY)) { 1069 status = -EACCES; 1070 mlog(ML_ERROR, "Readonly device detected but readonly " 1071 "mount was not specified.\n"); 1072 goto read_super_error; 1073 } 1074 1075 /* You should not be able to start a local heartbeat 1076 * on a readonly device. */ 1077 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { 1078 status = -EROFS; 1079 mlog(ML_ERROR, "Local heartbeat specified on readonly " 1080 "device.\n"); 1081 goto read_super_error; 1082 } 1083 1084 status = ocfs2_check_journals_nolocks(osb); 1085 if (status < 0) { 1086 if (status == -EROFS) 1087 mlog(ML_ERROR, "Recovery required on readonly " 1088 "file system, but write access is " 1089 "unavailable.\n"); 1090 else 1091 mlog_errno(status); 1092 goto read_super_error; 1093 } 1094 1095 ocfs2_set_ro_flag(osb, 1); 1096 1097 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. " 1098 "Cluster services will not be used for this mount. " 1099 "Recovery will be skipped.\n", osb->dev_str); 1100 } 1101 1102 if (!ocfs2_is_hard_readonly(osb)) { 1103 if (sb->s_flags & MS_RDONLY) 1104 ocfs2_set_ro_flag(osb, 0); 1105 } 1106 1107 status = ocfs2_verify_heartbeat(osb); 1108 if (status < 0) { 1109 mlog_errno(status); 1110 goto read_super_error; 1111 } 1112 1113 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, 1114 ocfs2_debugfs_root); 1115 if (IS_ERR_OR_NULL(osb->osb_debug_root)) { 1116 status = -EINVAL; 1117 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); 1118 goto read_super_error; 1119 } 1120 1121 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR, 1122 osb->osb_debug_root, 1123 osb, 1124 &ocfs2_osb_debug_fops); 1125 if (IS_ERR_OR_NULL(osb->osb_ctxt)) { 1126 status = -EINVAL; 1127 mlog_errno(status); 1128 goto read_super_error; 1129 } 1130 1131 if (ocfs2_meta_ecc(osb)) { 1132 status = ocfs2_blockcheck_stats_debugfs_install( 1133 &osb->osb_ecc_stats, 1134 osb->osb_debug_root); 1135 if (status) { 1136 mlog(ML_ERROR, 1137 "Unable to create blockcheck statistics " 1138 "files\n"); 1139 goto read_super_error; 1140 } 1141 } 1142 1143 status = ocfs2_mount_volume(sb); 1144 if (status < 0) 1145 goto read_super_error; 1146 1147 if (osb->root_inode) 1148 inode = igrab(osb->root_inode); 1149 1150 if (!inode) { 1151 status = -EIO; 1152 mlog_errno(status); 1153 goto read_super_error; 1154 } 1155 1156 root = d_make_root(inode); 1157 if (!root) { 1158 status = -ENOMEM; 1159 mlog_errno(status); 1160 goto read_super_error; 1161 } 1162 1163 sb->s_root = root; 1164 1165 ocfs2_complete_mount_recovery(osb); 1166 1167 if (ocfs2_mount_local(osb)) 1168 snprintf(nodestr, sizeof(nodestr), "local"); 1169 else 1170 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1171 1172 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " 1173 "with %s data mode.\n", 1174 osb->dev_str, nodestr, osb->slot_num, 1175 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : 1176 "ordered"); 1177 1178 atomic_set(&osb->vol_state, VOLUME_MOUNTED); 1179 wake_up(&osb->osb_mount_event); 1180 1181 /* Now we can initialize quotas because we can afford to wait 1182 * for cluster locks recovery now. That also means that truncation 1183 * log recovery can happen but that waits for proper quota setup */ 1184 if (!(sb->s_flags & MS_RDONLY)) { 1185 status = ocfs2_enable_quotas(osb); 1186 if (status < 0) { 1187 /* We have to err-out specially here because 1188 * s_root is already set */ 1189 mlog_errno(status); 1190 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1191 wake_up(&osb->osb_mount_event); 1192 return status; 1193 } 1194 } 1195 1196 ocfs2_complete_quota_recovery(osb); 1197 1198 /* Now we wake up again for processes waiting for quotas */ 1199 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS); 1200 wake_up(&osb->osb_mount_event); 1201 1202 /* Start this when the mount is almost sure of being successful */ 1203 ocfs2_orphan_scan_start(osb); 1204 1205 return status; 1206 1207 read_super_error: 1208 brelse(bh); 1209 1210 if (osb) { 1211 atomic_set(&osb->vol_state, VOLUME_DISABLED); 1212 wake_up(&osb->osb_mount_event); 1213 ocfs2_dismount_volume(sb, 1); 1214 } 1215 1216 if (status) 1217 mlog_errno(status); 1218 return status; 1219 } 1220 1221 static struct dentry *ocfs2_mount(struct file_system_type *fs_type, 1222 int flags, 1223 const char *dev_name, 1224 void *data) 1225 { 1226 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); 1227 } 1228 1229 static struct file_system_type ocfs2_fs_type = { 1230 .owner = THIS_MODULE, 1231 .name = "ocfs2", 1232 .mount = ocfs2_mount, 1233 .kill_sb = kill_block_super, 1234 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, 1235 .next = NULL 1236 }; 1237 MODULE_ALIAS_FS("ocfs2"); 1238 1239 static int ocfs2_check_set_options(struct super_block *sb, 1240 struct mount_options *options) 1241 { 1242 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA && 1243 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1244 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { 1245 mlog(ML_ERROR, "User quotas were requested, but this " 1246 "filesystem does not have the feature enabled.\n"); 1247 return 0; 1248 } 1249 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA && 1250 !OCFS2_HAS_RO_COMPAT_FEATURE(sb, 1251 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { 1252 mlog(ML_ERROR, "Group quotas were requested, but this " 1253 "filesystem does not have the feature enabled.\n"); 1254 return 0; 1255 } 1256 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL && 1257 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) { 1258 mlog(ML_ERROR, "ACL support requested but extended attributes " 1259 "feature is not enabled\n"); 1260 return 0; 1261 } 1262 /* No ACL setting specified? Use XATTR feature... */ 1263 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL | 1264 OCFS2_MOUNT_NO_POSIX_ACL))) { 1265 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) 1266 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1267 else 1268 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1269 } 1270 return 1; 1271 } 1272 1273 static int ocfs2_parse_options(struct super_block *sb, 1274 char *options, 1275 struct mount_options *mopt, 1276 int is_remount) 1277 { 1278 int status, user_stack = 0; 1279 char *p; 1280 u32 tmp; 1281 1282 trace_ocfs2_parse_options(is_remount, options ? options : "(none)"); 1283 1284 mopt->commit_interval = 0; 1285 mopt->mount_opt = OCFS2_MOUNT_NOINTR; 1286 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 1287 mopt->slot = OCFS2_INVALID_SLOT; 1288 mopt->localalloc_opt = -1; 1289 mopt->cluster_stack[0] = '\0'; 1290 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL; 1291 mopt->dir_resv_level = -1; 1292 1293 if (!options) { 1294 status = 1; 1295 goto bail; 1296 } 1297 1298 while ((p = strsep(&options, ",")) != NULL) { 1299 int token, option; 1300 substring_t args[MAX_OPT_ARGS]; 1301 1302 if (!*p) 1303 continue; 1304 1305 token = match_token(p, tokens, args); 1306 switch (token) { 1307 case Opt_hb_local: 1308 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL; 1309 break; 1310 case Opt_hb_none: 1311 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE; 1312 break; 1313 case Opt_hb_global: 1314 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL; 1315 break; 1316 case Opt_barrier: 1317 if (match_int(&args[0], &option)) { 1318 status = 0; 1319 goto bail; 1320 } 1321 if (option) 1322 mopt->mount_opt |= OCFS2_MOUNT_BARRIER; 1323 else 1324 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER; 1325 break; 1326 case Opt_intr: 1327 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR; 1328 break; 1329 case Opt_nointr: 1330 mopt->mount_opt |= OCFS2_MOUNT_NOINTR; 1331 break; 1332 case Opt_err_panic: 1333 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 1334 break; 1335 case Opt_err_ro: 1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; 1337 break; 1338 case Opt_data_ordered: 1339 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; 1340 break; 1341 case Opt_data_writeback: 1342 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; 1343 break; 1344 case Opt_user_xattr: 1345 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; 1346 break; 1347 case Opt_nouser_xattr: 1348 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; 1349 break; 1350 case Opt_atime_quantum: 1351 if (match_int(&args[0], &option)) { 1352 status = 0; 1353 goto bail; 1354 } 1355 if (option >= 0) 1356 mopt->atime_quantum = option; 1357 break; 1358 case Opt_slot: 1359 option = 0; 1360 if (match_int(&args[0], &option)) { 1361 status = 0; 1362 goto bail; 1363 } 1364 if (option) 1365 mopt->slot = (s16)option; 1366 break; 1367 case Opt_commit: 1368 option = 0; 1369 if (match_int(&args[0], &option)) { 1370 status = 0; 1371 goto bail; 1372 } 1373 if (option < 0) 1374 return 0; 1375 if (option == 0) 1376 option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1377 mopt->commit_interval = HZ * option; 1378 break; 1379 case Opt_localalloc: 1380 option = 0; 1381 if (match_int(&args[0], &option)) { 1382 status = 0; 1383 goto bail; 1384 } 1385 if (option >= 0) 1386 mopt->localalloc_opt = option; 1387 break; 1388 case Opt_localflocks: 1389 /* 1390 * Changing this during remount could race 1391 * flock() requests, or "unbalance" existing 1392 * ones (e.g., a lock is taken in one mode but 1393 * dropped in the other). If users care enough 1394 * to flip locking modes during remount, we 1395 * could add a "local" flag to individual 1396 * flock structures for proper tracking of 1397 * state. 1398 */ 1399 if (!is_remount) 1400 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS; 1401 break; 1402 case Opt_stack: 1403 /* Check both that the option we were passed 1404 * is of the right length and that it is a proper 1405 * string of the right length. 1406 */ 1407 if (((args[0].to - args[0].from) != 1408 OCFS2_STACK_LABEL_LEN) || 1409 (strnlen(args[0].from, 1410 OCFS2_STACK_LABEL_LEN) != 1411 OCFS2_STACK_LABEL_LEN)) { 1412 mlog(ML_ERROR, 1413 "Invalid cluster_stack option\n"); 1414 status = 0; 1415 goto bail; 1416 } 1417 memcpy(mopt->cluster_stack, args[0].from, 1418 OCFS2_STACK_LABEL_LEN); 1419 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; 1420 /* 1421 * Open code the memcmp here as we don't have 1422 * an osb to pass to 1423 * ocfs2_userspace_stack(). 1424 */ 1425 if (memcmp(mopt->cluster_stack, 1426 OCFS2_CLASSIC_CLUSTER_STACK, 1427 OCFS2_STACK_LABEL_LEN)) 1428 user_stack = 1; 1429 break; 1430 case Opt_inode64: 1431 mopt->mount_opt |= OCFS2_MOUNT_INODE64; 1432 break; 1433 case Opt_usrquota: 1434 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA; 1435 break; 1436 case Opt_grpquota: 1437 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA; 1438 break; 1439 case Opt_coherency_buffered: 1440 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED; 1441 break; 1442 case Opt_coherency_full: 1443 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED; 1444 break; 1445 case Opt_acl: 1446 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL; 1447 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL; 1448 break; 1449 case Opt_noacl: 1450 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL; 1451 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL; 1452 break; 1453 case Opt_resv_level: 1454 if (is_remount) 1455 break; 1456 if (match_int(&args[0], &option)) { 1457 status = 0; 1458 goto bail; 1459 } 1460 if (option >= OCFS2_MIN_RESV_LEVEL && 1461 option < OCFS2_MAX_RESV_LEVEL) 1462 mopt->resv_level = option; 1463 break; 1464 case Opt_dir_resv_level: 1465 if (is_remount) 1466 break; 1467 if (match_int(&args[0], &option)) { 1468 status = 0; 1469 goto bail; 1470 } 1471 if (option >= OCFS2_MIN_RESV_LEVEL && 1472 option < OCFS2_MAX_RESV_LEVEL) 1473 mopt->dir_resv_level = option; 1474 break; 1475 case Opt_journal_async_commit: 1476 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT; 1477 break; 1478 default: 1479 mlog(ML_ERROR, 1480 "Unrecognized mount option \"%s\" " 1481 "or missing value\n", p); 1482 status = 0; 1483 goto bail; 1484 } 1485 } 1486 1487 if (user_stack == 0) { 1488 /* Ensure only one heartbeat mode */ 1489 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | 1490 OCFS2_MOUNT_HB_GLOBAL | 1491 OCFS2_MOUNT_HB_NONE); 1492 if (hweight32(tmp) != 1) { 1493 mlog(ML_ERROR, "Invalid heartbeat mount options\n"); 1494 status = 0; 1495 goto bail; 1496 } 1497 } 1498 1499 status = 1; 1500 1501 bail: 1502 return status; 1503 } 1504 1505 static int ocfs2_show_options(struct seq_file *s, struct dentry *root) 1506 { 1507 struct ocfs2_super *osb = OCFS2_SB(root->d_sb); 1508 unsigned long opts = osb->s_mount_opt; 1509 unsigned int local_alloc_megs; 1510 1511 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) { 1512 seq_printf(s, ",_netdev"); 1513 if (opts & OCFS2_MOUNT_HB_LOCAL) 1514 seq_printf(s, ",%s", OCFS2_HB_LOCAL); 1515 else 1516 seq_printf(s, ",%s", OCFS2_HB_GLOBAL); 1517 } else 1518 seq_printf(s, ",%s", OCFS2_HB_NONE); 1519 1520 if (opts & OCFS2_MOUNT_NOINTR) 1521 seq_printf(s, ",nointr"); 1522 1523 if (opts & OCFS2_MOUNT_DATA_WRITEBACK) 1524 seq_printf(s, ",data=writeback"); 1525 else 1526 seq_printf(s, ",data=ordered"); 1527 1528 if (opts & OCFS2_MOUNT_BARRIER) 1529 seq_printf(s, ",barrier=1"); 1530 1531 if (opts & OCFS2_MOUNT_ERRORS_PANIC) 1532 seq_printf(s, ",errors=panic"); 1533 else 1534 seq_printf(s, ",errors=remount-ro"); 1535 1536 if (osb->preferred_slot != OCFS2_INVALID_SLOT) 1537 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot); 1538 1539 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum); 1540 1541 if (osb->osb_commit_interval) 1542 seq_printf(s, ",commit=%u", 1543 (unsigned) (osb->osb_commit_interval / HZ)); 1544 1545 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits); 1546 if (local_alloc_megs != ocfs2_la_default_mb(osb)) 1547 seq_printf(s, ",localalloc=%d", local_alloc_megs); 1548 1549 if (opts & OCFS2_MOUNT_LOCALFLOCKS) 1550 seq_printf(s, ",localflocks,"); 1551 1552 if (osb->osb_cluster_stack[0]) 1553 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN, 1554 osb->osb_cluster_stack); 1555 if (opts & OCFS2_MOUNT_USRQUOTA) 1556 seq_printf(s, ",usrquota"); 1557 if (opts & OCFS2_MOUNT_GRPQUOTA) 1558 seq_printf(s, ",grpquota"); 1559 1560 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED) 1561 seq_printf(s, ",coherency=buffered"); 1562 else 1563 seq_printf(s, ",coherency=full"); 1564 1565 if (opts & OCFS2_MOUNT_NOUSERXATTR) 1566 seq_printf(s, ",nouser_xattr"); 1567 else 1568 seq_printf(s, ",user_xattr"); 1569 1570 if (opts & OCFS2_MOUNT_INODE64) 1571 seq_printf(s, ",inode64"); 1572 1573 if (opts & OCFS2_MOUNT_POSIX_ACL) 1574 seq_printf(s, ",acl"); 1575 else 1576 seq_printf(s, ",noacl"); 1577 1578 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL) 1579 seq_printf(s, ",resv_level=%d", osb->osb_resv_level); 1580 1581 if (osb->osb_dir_resv_level != osb->osb_resv_level) 1582 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level); 1583 1584 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 1585 seq_printf(s, ",journal_async_commit"); 1586 1587 return 0; 1588 } 1589 1590 static int __init ocfs2_init(void) 1591 { 1592 int status; 1593 1594 status = init_ocfs2_uptodate_cache(); 1595 if (status < 0) 1596 goto out1; 1597 1598 status = ocfs2_initialize_mem_caches(); 1599 if (status < 0) 1600 goto out2; 1601 1602 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); 1603 if (!ocfs2_wq) { 1604 status = -ENOMEM; 1605 goto out3; 1606 } 1607 1608 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); 1609 if (IS_ERR_OR_NULL(ocfs2_debugfs_root)) { 1610 status = ocfs2_debugfs_root ? 1611 PTR_ERR(ocfs2_debugfs_root) : -ENOMEM; 1612 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); 1613 goto out4; 1614 } 1615 1616 ocfs2_set_locking_protocol(); 1617 1618 status = register_quota_format(&ocfs2_quota_format); 1619 if (status < 0) 1620 goto out4; 1621 status = register_filesystem(&ocfs2_fs_type); 1622 if (!status) 1623 return 0; 1624 1625 unregister_quota_format(&ocfs2_quota_format); 1626 out4: 1627 destroy_workqueue(ocfs2_wq); 1628 debugfs_remove(ocfs2_debugfs_root); 1629 out3: 1630 ocfs2_free_mem_caches(); 1631 out2: 1632 exit_ocfs2_uptodate_cache(); 1633 out1: 1634 mlog_errno(status); 1635 return status; 1636 } 1637 1638 static void __exit ocfs2_exit(void) 1639 { 1640 if (ocfs2_wq) { 1641 flush_workqueue(ocfs2_wq); 1642 destroy_workqueue(ocfs2_wq); 1643 } 1644 1645 unregister_quota_format(&ocfs2_quota_format); 1646 1647 debugfs_remove(ocfs2_debugfs_root); 1648 1649 ocfs2_free_mem_caches(); 1650 1651 unregister_filesystem(&ocfs2_fs_type); 1652 1653 exit_ocfs2_uptodate_cache(); 1654 } 1655 1656 static void ocfs2_put_super(struct super_block *sb) 1657 { 1658 trace_ocfs2_put_super(sb); 1659 1660 ocfs2_sync_blockdev(sb); 1661 ocfs2_dismount_volume(sb, 0); 1662 } 1663 1664 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 1665 { 1666 struct ocfs2_super *osb; 1667 u32 numbits, freebits; 1668 int status; 1669 struct ocfs2_dinode *bm_lock; 1670 struct buffer_head *bh = NULL; 1671 struct inode *inode = NULL; 1672 1673 trace_ocfs2_statfs(dentry->d_sb, buf); 1674 1675 osb = OCFS2_SB(dentry->d_sb); 1676 1677 inode = ocfs2_get_system_file_inode(osb, 1678 GLOBAL_BITMAP_SYSTEM_INODE, 1679 OCFS2_INVALID_SLOT); 1680 if (!inode) { 1681 mlog(ML_ERROR, "failed to get bitmap inode\n"); 1682 status = -EIO; 1683 goto bail; 1684 } 1685 1686 status = ocfs2_inode_lock(inode, &bh, 0); 1687 if (status < 0) { 1688 mlog_errno(status); 1689 goto bail; 1690 } 1691 1692 bm_lock = (struct ocfs2_dinode *) bh->b_data; 1693 1694 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); 1695 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); 1696 1697 buf->f_type = OCFS2_SUPER_MAGIC; 1698 buf->f_bsize = dentry->d_sb->s_blocksize; 1699 buf->f_namelen = OCFS2_MAX_FILENAME_LEN; 1700 buf->f_blocks = ((sector_t) numbits) * 1701 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1702 buf->f_bfree = ((sector_t) freebits) * 1703 (osb->s_clustersize >> osb->sb->s_blocksize_bits); 1704 buf->f_bavail = buf->f_bfree; 1705 buf->f_files = numbits; 1706 buf->f_ffree = freebits; 1707 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN) 1708 & 0xFFFFFFFFUL; 1709 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN, 1710 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL; 1711 1712 brelse(bh); 1713 1714 ocfs2_inode_unlock(inode, 0); 1715 status = 0; 1716 bail: 1717 if (inode) 1718 iput(inode); 1719 1720 if (status) 1721 mlog_errno(status); 1722 1723 return status; 1724 } 1725 1726 static void ocfs2_inode_init_once(void *data) 1727 { 1728 struct ocfs2_inode_info *oi = data; 1729 1730 oi->ip_flags = 0; 1731 oi->ip_open_count = 0; 1732 spin_lock_init(&oi->ip_lock); 1733 ocfs2_extent_map_init(&oi->vfs_inode); 1734 INIT_LIST_HEAD(&oi->ip_io_markers); 1735 oi->ip_dir_start_lookup = 0; 1736 mutex_init(&oi->ip_unaligned_aio); 1737 init_rwsem(&oi->ip_alloc_sem); 1738 init_rwsem(&oi->ip_xattr_sem); 1739 mutex_init(&oi->ip_io_mutex); 1740 1741 oi->ip_blkno = 0ULL; 1742 oi->ip_clusters = 0; 1743 1744 ocfs2_resv_init_once(&oi->ip_la_data_resv); 1745 1746 ocfs2_lock_res_init_once(&oi->ip_rw_lockres); 1747 ocfs2_lock_res_init_once(&oi->ip_inode_lockres); 1748 ocfs2_lock_res_init_once(&oi->ip_open_lockres); 1749 1750 init_waitqueue_head(&oi->append_dio_wq); 1751 1752 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode), 1753 &ocfs2_inode_caching_ops); 1754 1755 inode_init_once(&oi->vfs_inode); 1756 } 1757 1758 static int ocfs2_initialize_mem_caches(void) 1759 { 1760 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", 1761 sizeof(struct ocfs2_inode_info), 1762 0, 1763 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1764 SLAB_MEM_SPREAD), 1765 ocfs2_inode_init_once); 1766 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache", 1767 sizeof(struct ocfs2_dquot), 1768 0, 1769 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| 1770 SLAB_MEM_SPREAD), 1771 NULL); 1772 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache", 1773 sizeof(struct ocfs2_quota_chunk), 1774 0, 1775 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), 1776 NULL); 1777 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep || 1778 !ocfs2_qf_chunk_cachep) { 1779 if (ocfs2_inode_cachep) 1780 kmem_cache_destroy(ocfs2_inode_cachep); 1781 if (ocfs2_dquot_cachep) 1782 kmem_cache_destroy(ocfs2_dquot_cachep); 1783 if (ocfs2_qf_chunk_cachep) 1784 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1785 return -ENOMEM; 1786 } 1787 1788 return 0; 1789 } 1790 1791 static void ocfs2_free_mem_caches(void) 1792 { 1793 /* 1794 * Make sure all delayed rcu free inodes are flushed before we 1795 * destroy cache. 1796 */ 1797 rcu_barrier(); 1798 if (ocfs2_inode_cachep) 1799 kmem_cache_destroy(ocfs2_inode_cachep); 1800 ocfs2_inode_cachep = NULL; 1801 1802 if (ocfs2_dquot_cachep) 1803 kmem_cache_destroy(ocfs2_dquot_cachep); 1804 ocfs2_dquot_cachep = NULL; 1805 1806 if (ocfs2_qf_chunk_cachep) 1807 kmem_cache_destroy(ocfs2_qf_chunk_cachep); 1808 ocfs2_qf_chunk_cachep = NULL; 1809 } 1810 1811 static int ocfs2_get_sector(struct super_block *sb, 1812 struct buffer_head **bh, 1813 int block, 1814 int sect_size) 1815 { 1816 if (!sb_set_blocksize(sb, sect_size)) { 1817 mlog(ML_ERROR, "unable to set blocksize\n"); 1818 return -EIO; 1819 } 1820 1821 *bh = sb_getblk(sb, block); 1822 if (!*bh) { 1823 mlog_errno(-ENOMEM); 1824 return -ENOMEM; 1825 } 1826 lock_buffer(*bh); 1827 if (!buffer_dirty(*bh)) 1828 clear_buffer_uptodate(*bh); 1829 unlock_buffer(*bh); 1830 ll_rw_block(READ, 1, bh); 1831 wait_on_buffer(*bh); 1832 if (!buffer_uptodate(*bh)) { 1833 mlog_errno(-EIO); 1834 brelse(*bh); 1835 *bh = NULL; 1836 return -EIO; 1837 } 1838 1839 return 0; 1840 } 1841 1842 static int ocfs2_mount_volume(struct super_block *sb) 1843 { 1844 int status = 0; 1845 int unlock_super = 0; 1846 struct ocfs2_super *osb = OCFS2_SB(sb); 1847 1848 if (ocfs2_is_hard_readonly(osb)) 1849 goto leave; 1850 1851 status = ocfs2_dlm_init(osb); 1852 if (status < 0) { 1853 mlog_errno(status); 1854 goto leave; 1855 } 1856 1857 status = ocfs2_super_lock(osb, 1); 1858 if (status < 0) { 1859 mlog_errno(status); 1860 goto leave; 1861 } 1862 unlock_super = 1; 1863 1864 /* This will load up the node map and add ourselves to it. */ 1865 status = ocfs2_find_slot(osb); 1866 if (status < 0) { 1867 mlog_errno(status); 1868 goto leave; 1869 } 1870 1871 /* load all node-local system inodes */ 1872 status = ocfs2_init_local_system_inodes(osb); 1873 if (status < 0) { 1874 mlog_errno(status); 1875 goto leave; 1876 } 1877 1878 status = ocfs2_check_volume(osb); 1879 if (status < 0) { 1880 mlog_errno(status); 1881 goto leave; 1882 } 1883 1884 status = ocfs2_truncate_log_init(osb); 1885 if (status < 0) 1886 mlog_errno(status); 1887 1888 leave: 1889 if (unlock_super) 1890 ocfs2_super_unlock(osb, 1); 1891 1892 return status; 1893 } 1894 1895 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) 1896 { 1897 int tmp, hangup_needed = 0; 1898 struct ocfs2_super *osb = NULL; 1899 char nodestr[12]; 1900 1901 trace_ocfs2_dismount_volume(sb); 1902 1903 BUG_ON(!sb); 1904 osb = OCFS2_SB(sb); 1905 BUG_ON(!osb); 1906 1907 debugfs_remove(osb->osb_ctxt); 1908 1909 /* Orphan scan should be stopped as early as possible */ 1910 ocfs2_orphan_scan_stop(osb); 1911 1912 ocfs2_disable_quotas(osb); 1913 1914 /* All dquots should be freed by now */ 1915 WARN_ON(!llist_empty(&osb->dquot_drop_list)); 1916 /* Wait for worker to be done with the work structure in osb */ 1917 cancel_work_sync(&osb->dquot_drop_work); 1918 1919 ocfs2_shutdown_local_alloc(osb); 1920 1921 ocfs2_truncate_log_shutdown(osb); 1922 1923 /* This will disable recovery and flush any recovery work. */ 1924 ocfs2_recovery_exit(osb); 1925 1926 ocfs2_journal_shutdown(osb); 1927 1928 ocfs2_sync_blockdev(sb); 1929 1930 ocfs2_purge_refcount_trees(osb); 1931 1932 /* No cluster connection means we've failed during mount, so skip 1933 * all the steps which depended on that to complete. */ 1934 if (osb->cconn) { 1935 tmp = ocfs2_super_lock(osb, 1); 1936 if (tmp < 0) { 1937 mlog_errno(tmp); 1938 return; 1939 } 1940 } 1941 1942 if (osb->slot_num != OCFS2_INVALID_SLOT) 1943 ocfs2_put_slot(osb); 1944 1945 if (osb->cconn) 1946 ocfs2_super_unlock(osb, 1); 1947 1948 ocfs2_release_system_inodes(osb); 1949 1950 /* 1951 * If we're dismounting due to mount error, mount.ocfs2 will clean 1952 * up heartbeat. If we're a local mount, there is no heartbeat. 1953 * If we failed before we got a uuid_str yet, we can't stop 1954 * heartbeat. Otherwise, do it. 1955 */ 1956 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str && 1957 !ocfs2_is_hard_readonly(osb)) 1958 hangup_needed = 1; 1959 1960 if (osb->cconn) 1961 ocfs2_dlm_shutdown(osb, hangup_needed); 1962 1963 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats); 1964 debugfs_remove(osb->osb_debug_root); 1965 1966 if (hangup_needed) 1967 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str)); 1968 1969 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); 1970 1971 if (ocfs2_mount_local(osb)) 1972 snprintf(nodestr, sizeof(nodestr), "local"); 1973 else 1974 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); 1975 1976 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", 1977 osb->dev_str, nodestr); 1978 1979 ocfs2_delete_osb(osb); 1980 kfree(osb); 1981 sb->s_dev = 0; 1982 sb->s_fs_info = NULL; 1983 } 1984 1985 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, 1986 unsigned uuid_bytes) 1987 { 1988 int i, ret; 1989 char *ptr; 1990 1991 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); 1992 1993 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); 1994 if (osb->uuid_str == NULL) 1995 return -ENOMEM; 1996 1997 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { 1998 /* print with null */ 1999 ret = snprintf(ptr, 3, "%02X", uuid[i]); 2000 if (ret != 2) /* drop super cleans up */ 2001 return -EINVAL; 2002 /* then only advance past the last char */ 2003 ptr += 2; 2004 } 2005 2006 return 0; 2007 } 2008 2009 /* Make sure entire volume is addressable by our journal. Requires 2010 osb_clusters_at_boot to be valid and for the journal to have been 2011 initialized by ocfs2_journal_init(). */ 2012 static int ocfs2_journal_addressable(struct ocfs2_super *osb) 2013 { 2014 int status = 0; 2015 u64 max_block = 2016 ocfs2_clusters_to_blocks(osb->sb, 2017 osb->osb_clusters_at_boot) - 1; 2018 2019 /* 32-bit block number is always OK. */ 2020 if (max_block <= (u32)~0ULL) 2021 goto out; 2022 2023 /* Volume is "huge", so see if our journal is new enough to 2024 support it. */ 2025 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb, 2026 OCFS2_FEATURE_COMPAT_JBD2_SB) && 2027 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0, 2028 JBD2_FEATURE_INCOMPAT_64BIT))) { 2029 mlog(ML_ERROR, "The journal cannot address the entire volume. " 2030 "Enable the 'block64' journal option with tunefs.ocfs2"); 2031 status = -EFBIG; 2032 goto out; 2033 } 2034 2035 out: 2036 return status; 2037 } 2038 2039 static int ocfs2_initialize_super(struct super_block *sb, 2040 struct buffer_head *bh, 2041 int sector_size, 2042 struct ocfs2_blockcheck_stats *stats) 2043 { 2044 int status; 2045 int i, cbits, bbits; 2046 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; 2047 struct inode *inode = NULL; 2048 struct ocfs2_journal *journal; 2049 struct ocfs2_super *osb; 2050 u64 total_blocks; 2051 2052 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL); 2053 if (!osb) { 2054 status = -ENOMEM; 2055 mlog_errno(status); 2056 goto bail; 2057 } 2058 2059 sb->s_fs_info = osb; 2060 sb->s_op = &ocfs2_sops; 2061 sb->s_d_op = &ocfs2_dentry_ops; 2062 sb->s_export_op = &ocfs2_export_ops; 2063 sb->s_qcop = &dquot_quotactl_sysfile_ops; 2064 sb->dq_op = &ocfs2_quota_operations; 2065 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 2066 sb->s_xattr = ocfs2_xattr_handlers; 2067 sb->s_time_gran = 1; 2068 sb->s_flags |= MS_NOATIME; 2069 /* this is needed to support O_LARGEFILE */ 2070 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2071 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits); 2072 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits); 2073 memcpy(sb->s_uuid, di->id2.i_super.s_uuid, 2074 sizeof(di->id2.i_super.s_uuid)); 2075 2076 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1; 2077 2078 for (i = 0; i < 3; i++) 2079 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]); 2080 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2081 2082 osb->sb = sb; 2083 /* Save off for ocfs2_rw_direct */ 2084 osb->s_sectsize_bits = blksize_bits(sector_size); 2085 BUG_ON(!osb->s_sectsize_bits); 2086 2087 spin_lock_init(&osb->dc_task_lock); 2088 init_waitqueue_head(&osb->dc_event); 2089 osb->dc_work_sequence = 0; 2090 osb->dc_wake_sequence = 0; 2091 INIT_LIST_HEAD(&osb->blocked_lock_list); 2092 osb->blocked_lock_count = 0; 2093 spin_lock_init(&osb->osb_lock); 2094 spin_lock_init(&osb->osb_xattr_lock); 2095 ocfs2_init_steal_slots(osb); 2096 2097 mutex_init(&osb->system_file_mutex); 2098 2099 atomic_set(&osb->alloc_stats.moves, 0); 2100 atomic_set(&osb->alloc_stats.local_data, 0); 2101 atomic_set(&osb->alloc_stats.bitmap_data, 0); 2102 atomic_set(&osb->alloc_stats.bg_allocs, 0); 2103 atomic_set(&osb->alloc_stats.bg_extends, 0); 2104 2105 /* Copy the blockcheck stats from the superblock probe */ 2106 osb->osb_ecc_stats = *stats; 2107 2108 ocfs2_init_node_maps(osb); 2109 2110 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", 2111 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); 2112 2113 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); 2114 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { 2115 mlog(ML_ERROR, "Invalid number of node slots (%u)\n", 2116 osb->max_slots); 2117 status = -EINVAL; 2118 goto bail; 2119 } 2120 2121 ocfs2_orphan_scan_init(osb); 2122 2123 status = ocfs2_recovery_init(osb); 2124 if (status) { 2125 mlog(ML_ERROR, "Unable to initialize recovery state\n"); 2126 mlog_errno(status); 2127 goto bail; 2128 } 2129 2130 init_waitqueue_head(&osb->checkpoint_event); 2131 2132 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; 2133 2134 osb->slot_num = OCFS2_INVALID_SLOT; 2135 2136 osb->s_xattr_inline_size = le16_to_cpu( 2137 di->id2.i_super.s_xattr_inline_size); 2138 2139 osb->local_alloc_state = OCFS2_LA_UNUSED; 2140 osb->local_alloc_bh = NULL; 2141 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker); 2142 2143 init_waitqueue_head(&osb->osb_mount_event); 2144 2145 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap); 2146 if (status) { 2147 mlog_errno(status); 2148 goto bail; 2149 } 2150 2151 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); 2152 if (!osb->vol_label) { 2153 mlog(ML_ERROR, "unable to alloc vol label\n"); 2154 status = -ENOMEM; 2155 goto bail; 2156 } 2157 2158 osb->slot_recovery_generations = 2159 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations), 2160 GFP_KERNEL); 2161 if (!osb->slot_recovery_generations) { 2162 status = -ENOMEM; 2163 mlog_errno(status); 2164 goto bail; 2165 } 2166 2167 init_waitqueue_head(&osb->osb_wipe_event); 2168 osb->osb_orphan_wipes = kcalloc(osb->max_slots, 2169 sizeof(*osb->osb_orphan_wipes), 2170 GFP_KERNEL); 2171 if (!osb->osb_orphan_wipes) { 2172 status = -ENOMEM; 2173 mlog_errno(status); 2174 goto bail; 2175 } 2176 2177 osb->osb_rf_lock_tree = RB_ROOT; 2178 2179 osb->s_feature_compat = 2180 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); 2181 osb->s_feature_ro_compat = 2182 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); 2183 osb->s_feature_incompat = 2184 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); 2185 2186 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { 2187 mlog(ML_ERROR, "couldn't mount because of unsupported " 2188 "optional features (%x).\n", i); 2189 status = -EINVAL; 2190 goto bail; 2191 } 2192 if (!(osb->sb->s_flags & MS_RDONLY) && 2193 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { 2194 mlog(ML_ERROR, "couldn't mount RDWR because of " 2195 "unsupported optional features (%x).\n", i); 2196 status = -EINVAL; 2197 goto bail; 2198 } 2199 2200 if (ocfs2_clusterinfo_valid(osb)) { 2201 osb->osb_stackflags = 2202 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags; 2203 strlcpy(osb->osb_cluster_stack, 2204 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, 2205 OCFS2_STACK_LABEL_LEN + 1); 2206 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) { 2207 mlog(ML_ERROR, 2208 "couldn't mount because of an invalid " 2209 "cluster stack label (%s) \n", 2210 osb->osb_cluster_stack); 2211 status = -EINVAL; 2212 goto bail; 2213 } 2214 strlcpy(osb->osb_cluster_name, 2215 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster, 2216 OCFS2_CLUSTER_NAME_LEN + 1); 2217 } else { 2218 /* The empty string is identical with classic tools that 2219 * don't know about s_cluster_info. */ 2220 osb->osb_cluster_stack[0] = '\0'; 2221 } 2222 2223 get_random_bytes(&osb->s_next_generation, sizeof(u32)); 2224 2225 /* FIXME 2226 * This should be done in ocfs2_journal_init(), but unknown 2227 * ordering issues will cause the filesystem to crash. 2228 * If anyone wants to figure out what part of the code 2229 * refers to osb->journal before ocfs2_journal_init() is run, 2230 * be my guest. 2231 */ 2232 /* initialize our journal structure */ 2233 2234 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL); 2235 if (!journal) { 2236 mlog(ML_ERROR, "unable to alloc journal\n"); 2237 status = -ENOMEM; 2238 goto bail; 2239 } 2240 osb->journal = journal; 2241 journal->j_osb = osb; 2242 2243 atomic_set(&journal->j_num_trans, 0); 2244 init_rwsem(&journal->j_trans_barrier); 2245 init_waitqueue_head(&journal->j_checkpointed); 2246 spin_lock_init(&journal->j_lock); 2247 journal->j_trans_id = (unsigned long) 1; 2248 INIT_LIST_HEAD(&journal->j_la_cleanups); 2249 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery); 2250 journal->j_state = OCFS2_JOURNAL_FREE; 2251 2252 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs); 2253 init_llist_head(&osb->dquot_drop_list); 2254 2255 /* get some pseudo constants for clustersize bits */ 2256 osb->s_clustersize_bits = 2257 le32_to_cpu(di->id2.i_super.s_clustersize_bits); 2258 osb->s_clustersize = 1 << osb->s_clustersize_bits; 2259 2260 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || 2261 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { 2262 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", 2263 osb->s_clustersize); 2264 status = -EINVAL; 2265 goto bail; 2266 } 2267 2268 total_blocks = ocfs2_clusters_to_blocks(osb->sb, 2269 le32_to_cpu(di->i_clusters)); 2270 2271 status = generic_check_addressable(osb->sb->s_blocksize_bits, 2272 total_blocks); 2273 if (status) { 2274 mlog(ML_ERROR, "Volume too large " 2275 "to mount safely on this system"); 2276 status = -EFBIG; 2277 goto bail; 2278 } 2279 2280 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, 2281 sizeof(di->id2.i_super.s_uuid))) { 2282 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); 2283 status = -ENOMEM; 2284 goto bail; 2285 } 2286 2287 strlcpy(osb->vol_label, di->id2.i_super.s_label, 2288 OCFS2_MAX_VOL_LABEL_LEN); 2289 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); 2290 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); 2291 osb->first_cluster_group_blkno = 2292 le64_to_cpu(di->id2.i_super.s_first_cluster_group); 2293 osb->fs_generation = le32_to_cpu(di->i_fs_generation); 2294 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); 2295 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str, 2296 (unsigned long long)osb->root_blkno, 2297 (unsigned long long)osb->system_dir_blkno, 2298 osb->s_clustersize_bits); 2299 2300 osb->osb_dlm_debug = ocfs2_new_dlm_debug(); 2301 if (!osb->osb_dlm_debug) { 2302 status = -ENOMEM; 2303 mlog_errno(status); 2304 goto bail; 2305 } 2306 2307 atomic_set(&osb->vol_state, VOLUME_INIT); 2308 2309 /* load root, system_dir, and all global system inodes */ 2310 status = ocfs2_init_global_system_inodes(osb); 2311 if (status < 0) { 2312 mlog_errno(status); 2313 goto bail; 2314 } 2315 2316 /* 2317 * global bitmap 2318 */ 2319 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, 2320 OCFS2_INVALID_SLOT); 2321 if (!inode) { 2322 status = -EINVAL; 2323 mlog_errno(status); 2324 goto bail; 2325 } 2326 2327 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; 2328 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters; 2329 iput(inode); 2330 2331 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0, 2332 osb->s_feature_incompat) * 8; 2333 2334 status = ocfs2_init_slot_info(osb); 2335 if (status < 0) { 2336 mlog_errno(status); 2337 goto bail; 2338 } 2339 cleancache_init_shared_fs(sb); 2340 2341 bail: 2342 return status; 2343 } 2344 2345 /* 2346 * will return: -EAGAIN if it is ok to keep searching for superblocks 2347 * -EINVAL if there is a bad superblock 2348 * 0 on success 2349 */ 2350 static int ocfs2_verify_volume(struct ocfs2_dinode *di, 2351 struct buffer_head *bh, 2352 u32 blksz, 2353 struct ocfs2_blockcheck_stats *stats) 2354 { 2355 int status = -EAGAIN; 2356 2357 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, 2358 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { 2359 /* We have to do a raw check of the feature here */ 2360 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) & 2361 OCFS2_FEATURE_INCOMPAT_META_ECC) { 2362 status = ocfs2_block_check_validate(bh->b_data, 2363 bh->b_size, 2364 &di->i_check, 2365 stats); 2366 if (status) 2367 goto out; 2368 } 2369 status = -EINVAL; 2370 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { 2371 mlog(ML_ERROR, "found superblock with incorrect block " 2372 "size: found %u, should be %u\n", 2373 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), 2374 blksz); 2375 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != 2376 OCFS2_MAJOR_REV_LEVEL || 2377 le16_to_cpu(di->id2.i_super.s_minor_rev_level) != 2378 OCFS2_MINOR_REV_LEVEL) { 2379 mlog(ML_ERROR, "found superblock with bad version: " 2380 "found %u.%u, should be %u.%u\n", 2381 le16_to_cpu(di->id2.i_super.s_major_rev_level), 2382 le16_to_cpu(di->id2.i_super.s_minor_rev_level), 2383 OCFS2_MAJOR_REV_LEVEL, 2384 OCFS2_MINOR_REV_LEVEL); 2385 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { 2386 mlog(ML_ERROR, "bad block number on superblock: " 2387 "found %llu, should be %llu\n", 2388 (unsigned long long)le64_to_cpu(di->i_blkno), 2389 (unsigned long long)bh->b_blocknr); 2390 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || 2391 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { 2392 mlog(ML_ERROR, "bad cluster size found: %u\n", 2393 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); 2394 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { 2395 mlog(ML_ERROR, "bad root_blkno: 0\n"); 2396 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { 2397 mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); 2398 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { 2399 mlog(ML_ERROR, 2400 "Superblock slots found greater than file system " 2401 "maximum: found %u, max %u\n", 2402 le16_to_cpu(di->id2.i_super.s_max_slots), 2403 OCFS2_MAX_SLOTS); 2404 } else { 2405 /* found it! */ 2406 status = 0; 2407 } 2408 } 2409 2410 out: 2411 if (status && status != -EAGAIN) 2412 mlog_errno(status); 2413 return status; 2414 } 2415 2416 static int ocfs2_check_volume(struct ocfs2_super *osb) 2417 { 2418 int status; 2419 int dirty; 2420 int local; 2421 struct ocfs2_dinode *local_alloc = NULL; /* only used if we 2422 * recover 2423 * ourselves. */ 2424 2425 /* Init our journal object. */ 2426 status = ocfs2_journal_init(osb->journal, &dirty); 2427 if (status < 0) { 2428 mlog(ML_ERROR, "Could not initialize journal!\n"); 2429 goto finally; 2430 } 2431 2432 /* Now that journal has been initialized, check to make sure 2433 entire volume is addressable. */ 2434 status = ocfs2_journal_addressable(osb); 2435 if (status) 2436 goto finally; 2437 2438 /* If the journal was unmounted cleanly then we don't want to 2439 * recover anything. Otherwise, journal_load will do that 2440 * dirty work for us :) */ 2441 if (!dirty) { 2442 status = ocfs2_journal_wipe(osb->journal, 0); 2443 if (status < 0) { 2444 mlog_errno(status); 2445 goto finally; 2446 } 2447 } else { 2448 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not " 2449 "unmounted cleanly, recovering it.\n", osb->dev_str); 2450 } 2451 2452 local = ocfs2_mount_local(osb); 2453 2454 /* will play back anything left in the journal. */ 2455 status = ocfs2_journal_load(osb->journal, local, dirty); 2456 if (status < 0) { 2457 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status); 2458 goto finally; 2459 } 2460 2461 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT) 2462 jbd2_journal_set_features(osb->journal->j_journal, 2463 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2464 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2465 else 2466 jbd2_journal_clear_features(osb->journal->j_journal, 2467 JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2468 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2469 2470 if (dirty) { 2471 /* recover my local alloc if we didn't unmount cleanly. */ 2472 status = ocfs2_begin_local_alloc_recovery(osb, 2473 osb->slot_num, 2474 &local_alloc); 2475 if (status < 0) { 2476 mlog_errno(status); 2477 goto finally; 2478 } 2479 /* we complete the recovery process after we've marked 2480 * ourselves as mounted. */ 2481 } 2482 2483 status = ocfs2_load_local_alloc(osb); 2484 if (status < 0) { 2485 mlog_errno(status); 2486 goto finally; 2487 } 2488 2489 if (dirty) { 2490 /* Recovery will be completed after we've mounted the 2491 * rest of the volume. */ 2492 osb->dirty = 1; 2493 osb->local_alloc_copy = local_alloc; 2494 local_alloc = NULL; 2495 } 2496 2497 /* go through each journal, trylock it and if you get the 2498 * lock, and it's marked as dirty, set the bit in the recover 2499 * map and launch a recovery thread for it. */ 2500 status = ocfs2_mark_dead_nodes(osb); 2501 if (status < 0) { 2502 mlog_errno(status); 2503 goto finally; 2504 } 2505 2506 status = ocfs2_compute_replay_slots(osb); 2507 if (status < 0) 2508 mlog_errno(status); 2509 2510 finally: 2511 kfree(local_alloc); 2512 2513 if (status) 2514 mlog_errno(status); 2515 return status; 2516 } 2517 2518 /* 2519 * The routine gets called from dismount or close whenever a dismount on 2520 * volume is requested and the osb open count becomes 1. 2521 * It will remove the osb from the global list and also free up all the 2522 * initialized resources and fileobject. 2523 */ 2524 static void ocfs2_delete_osb(struct ocfs2_super *osb) 2525 { 2526 /* This function assumes that the caller has the main osb resource */ 2527 2528 ocfs2_free_slot_info(osb); 2529 2530 kfree(osb->osb_orphan_wipes); 2531 kfree(osb->slot_recovery_generations); 2532 /* FIXME 2533 * This belongs in journal shutdown, but because we have to 2534 * allocate osb->journal at the start of ocfs2_initialize_osb(), 2535 * we free it here. 2536 */ 2537 kfree(osb->journal); 2538 kfree(osb->local_alloc_copy); 2539 kfree(osb->uuid_str); 2540 kfree(osb->vol_label); 2541 ocfs2_put_dlm_debug(osb->osb_dlm_debug); 2542 memset(osb, 0, sizeof(struct ocfs2_super)); 2543 } 2544 2545 /* Put OCFS2 into a readonly state, or (if the user specifies it), 2546 * panic(). We do not support continue-on-error operation. */ 2547 static void ocfs2_handle_error(struct super_block *sb) 2548 { 2549 struct ocfs2_super *osb = OCFS2_SB(sb); 2550 2551 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) 2552 panic("OCFS2: (device %s): panic forced after error\n", 2553 sb->s_id); 2554 2555 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); 2556 2557 if (sb->s_flags & MS_RDONLY && 2558 (ocfs2_is_soft_readonly(osb) || 2559 ocfs2_is_hard_readonly(osb))) 2560 return; 2561 2562 printk(KERN_CRIT "File system is now read-only due to the potential " 2563 "of on-disk corruption. Please run fsck.ocfs2 once the file " 2564 "system is unmounted.\n"); 2565 sb->s_flags |= MS_RDONLY; 2566 ocfs2_set_ro_flag(osb, 0); 2567 } 2568 2569 void __ocfs2_error(struct super_block *sb, const char *function, 2570 const char *fmt, ...) 2571 { 2572 struct va_format vaf; 2573 va_list args; 2574 2575 va_start(args, fmt); 2576 vaf.fmt = fmt; 2577 vaf.va = &args; 2578 2579 /* Not using mlog here because we want to show the actual 2580 * function the error came from. */ 2581 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV\n", 2582 sb->s_id, function, &vaf); 2583 2584 va_end(args); 2585 2586 ocfs2_handle_error(sb); 2587 } 2588 2589 /* Handle critical errors. This is intentionally more drastic than 2590 * ocfs2_handle_error, so we only use for things like journal errors, 2591 * etc. */ 2592 void __ocfs2_abort(struct super_block *sb, const char *function, 2593 const char *fmt, ...) 2594 { 2595 struct va_format vaf; 2596 va_list args; 2597 2598 va_start(args, fmt); 2599 2600 vaf.fmt = fmt; 2601 vaf.va = &args; 2602 2603 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV\n", 2604 sb->s_id, function, &vaf); 2605 2606 va_end(args); 2607 2608 /* We don't have the cluster support yet to go straight to 2609 * hard readonly in here. Until then, we want to keep 2610 * ocfs2_abort() so that we can at least mark critical 2611 * errors. 2612 * 2613 * TODO: This should abort the journal and alert other nodes 2614 * that our slot needs recovery. */ 2615 2616 /* Force a panic(). This stinks, but it's better than letting 2617 * things continue without having a proper hard readonly 2618 * here. */ 2619 if (!ocfs2_mount_local(OCFS2_SB(sb))) 2620 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; 2621 ocfs2_handle_error(sb); 2622 } 2623 2624 /* 2625 * Void signal blockers, because in-kernel sigprocmask() only fails 2626 * when SIG_* is wrong. 2627 */ 2628 void ocfs2_block_signals(sigset_t *oldset) 2629 { 2630 int rc; 2631 sigset_t blocked; 2632 2633 sigfillset(&blocked); 2634 rc = sigprocmask(SIG_BLOCK, &blocked, oldset); 2635 BUG_ON(rc); 2636 } 2637 2638 void ocfs2_unblock_signals(sigset_t *oldset) 2639 { 2640 int rc = sigprocmask(SIG_SETMASK, oldset, NULL); 2641 BUG_ON(rc); 2642 } 2643 2644 module_init(ocfs2_init); 2645 module_exit(ocfs2_exit); 2646